bird	wing-length	branch-diameter
1.000000000e+000	7.900000000e+001	1.020000000e+000
2.000000000e+000	8.000000000e+001	1.040000000e+000
3.000000000e+000	8.150000000e+001	1.200000000e+000
4.000000000e+000	8.400000000e+001	1.510000000e+000
5.000000000e+000	7.950000000e+001	1.210000000e+000
6.000000000e+000	8.250000000e+001	1.560000000e+000
7.000000000e+000	8.350000000e+001	1.290000000e+000